Influence of Dilation on the Strength of Sand _ Steel Interfaces

[摘要] In this paper the sand-steel interface behaviour is analysed on the basis of frictional state theory. It is shown that for a small stress level the influence of dilatancy is fundamentally similar for sand-steel and sand-sand behaviour for a direct shear test. The use of the new parameter describes the influence of surface roughness on stress-dilatancy relationship. The peak strength of sand-steel is analysed. Values of the new parameter grow with normalised roughness for smooth surface and are constant for intermediate and rough surfaces. It is also shown that values of normalised friction coefficient obtained theoretically are similar with those shown in literature.

[发布机构] Bialystok University of Technology, Faculty of Civil and Environmental Engineering, Wiejska 45 E, Bialystok; 15-351, Poland^1

[关键词] Direct shear test;Friction coefficients;New parameters;Peak strength;Rough surfaces;Smooth surface;Steel interfaces;Stress dilatancies